In order to reduce carbon emissions and fulfill the country's commitment to the world, energy must be efficiently utilized. Coal, as a commonly used energy source, and its environmentally friendly and efficient utilization will make a great contribution to the realization of low-carbon goals. The combustion efficiency of pulverized coal is closely related to its fineness. The more appropriate the fineness of pulverized coal, the faster the combustion, the smaller the loss of incomplete combustion, and the higher the combustion efficiency. Therefore, high-performance grinding equipment is used to grind coal. Can greatly improve the utilization of coal heat energy.


Vertical mill, also known as roller mill, is widely used in large-scale material grinding and ultrafine grinding processing in coal, cement chemical, electric power and other industries. The integrated ideal equipment for the milling industry, used for coal powder preparation can make the product fineness meet the industry and national standards.


Structural features of vertical mill:

1. Low investment cost: the system is simple, the layout is compact, and the floor area is about half of that of a ball mill. And it can be arranged in the open air, so the investment cost is greatly reduced.

2. Low operating cost and high efficiency: during work, the grinding roller directly contacts the material on the grinding disc, thus reducing energy consumption.

3. Strong drying ability: the hot air directly contacts the material, and the drying efficiency is high.

4. Easy and reliable operation: The whole equipment is automatically controlled and can be operated remotely.

5. Stable quality of finished product: Because the material stays in the mill for a short time, it is easy to detect and control the particle size and composition, and reduce repeated grinding, so the product quality is stable.

6. The maintenance of the whole machine is convenient: to replace the roller cover and the liner, the boom can be turned over by the maintenance oil cylinder, which is convenient and quick, and reduces maintenance time.

7. Good working environment: small vibration, low noise, the overall sealing of the equipment, negative pressure in the system during work, no dust pollution, environmentally friendly and clean.


The ZKRM vertical mill produced by Henan Zhengzhou Mining Machinery Co., Ltd has the advantages of high grinding efficiency, low power consumption, large adaptable particle size, easy control of output fineness, simple equipment process, small production site, low noise pollution, less dust, easy to use and maintain Simple, low operating costs and other advantages.


During the pulverized coal production process, the main motor drives the grinding disc to rotate through the reducer, and at the same time, the hot air enters the vertical mill body from the air inlet, and the raw coal falls to the center of the grinding disc through the feeding pipe, and the grinding disc rotates at a constant speed with the help of centrifugal force. Evenly disperse and pave outwards to form a material bed of a certain thickness. The raw coal is crushed by multiple grinding rollers on the grinding table at the same time and crushed. Driven continuously by the centrifugal force, the raw coal continuously moves towards the outer edge of the grinding table. When the powder leaving the grinding table encounters the hot gas entering the mill through the air ring and rises accordingly, it enters the separator through the middle shell of the mill. During the process, the pulverized coal and the hot gas have fully exchanged heat, and the water is quickly evaporated. The powder separator controls the particle size of the finished product at the outlet of the roller mill. The particles larger than the specified size are separated and fall back to the grinding table. The coal powder that meets the fineness requirements enters the dust collector through the powder separator, and the collected finished product is sent to the finished product warehouse. 


ZKRM series vertical mill is a high-efficiency and energy-saving grinding equipment that integrates drying, grinding, grading and conveying, developed by Henan Zhengzhou Mining Machinery Co., Ltd Learning and absorbing foreign advanced technology after more than 20 years of research and practice. 


Compared with other grinding equipment, the pulverized coal vertical mill has the following advantages:

1. The grinding efficiency is high, and the power consumption can be reduced by more than 30%;

2. Integrating grinding, grading and drying, the equipment layout is compact, the process route is simplified, the building area and building space are more than 30% smaller than the ball mill system, saving infrastructure investment;

3. The drying ability is strong, and the auxiliary heat source can be used to dry materials with a moisture content of 12%-15%;

4. The maximum grain size of the grinding mill can reach 80-120mm, and the large vertical mill can reach 200mm, which simplifies the crushing process;

5. The wearing parts have a long service life, because there is no direct contact between metals during the operation of the vertical mill, so the wear is less (wearing 5g/t);

6. The residence time of the material in the mill is short (2-3min), which is easy to automatically control the chemical composition of the ingredients and products;